Search results

The purpose of this paper is to develop a numerical model for the simulation of the dynamics of nanoparticles (NPs) at liquid–liquid interfaces. Two cases have been studied, NPs smaller than the interfacial thickness, and NPs greater than the interfacial thickness.

The model is based on the molecular dynamics (MD) simulation in addition to phase field (PF) method, through which the discrete model of particles motion is superimposed on the continuum model of fluids which is a new ide a in numerical modeling. The liquid–liquid interface is modeled using the diffuse interface model.

For NPs smaller than the interfacial thickness, the results obtained show that the concentration gradient of one fluid in the other gives rise to a hydrodynamic drag force that drives the NPs to agglomerate at the interface. Whereas, for spherical NPs greater than the interfacial thickness, the results show that such NPs oscillate at the interface which agrees with some experimental studies.

The results are important in the field of numerical modeling, especially that the model is general and can be used to study different systems. This will be of great interest in the field of studying the behavior of NPs inside fluids and near interfaces, which enters in many industrial applications.

The idea of superimposing the molecular dynamic method on the PF method is a new idea in numerical modeling.

Purpose: The chapter explains how entrepreneurship can generate either subsistence, destructive, or peace-positive outcomes in the conflict zones of the Middle East and North Africa (MENA) region. Institutional arrangements are examined for how they can advance the latter.

Methodology/approach: Literatures from conflict resolution, development, economics, corporate social responsibility, entrepreneurship, and psychology are drawn on to frame the multiple roles of entrepreneurs in conflict zones, and understand the institutional arrangements that support peace-positive entrepreneurship.

Findings: The chapter indicates that formalization plays a major role in promoting peace-positive entrepreneurship while deterring destructive entrepreneurship. Conflict zone institutional arrangements that reestablish trust, can uphold the rule of law, and incentivize entrepreneurial activity aid in the formalization process. Special attention is paid to the inclusive nature of these activities, with the need to heal religious, tribal, and sectarian divides in the region, and promote the inclusion of all societal actors (namely, minorities and women) to engage in enterprising activities.

Social implications: The chapter outlines the importance for both foreign donors and local actors to understand the determinant role of institutions in conflict zone entrepreneurial ecosystems, promoting the role of institutional reform over and above the micro-level activity currently grabbing attention in the region.

Originality/value of the chapter: The chapter contrasts the singular narrative often presented on the positive role of conflict zone entrepreneurship in the informal sector, offering a paradoxical view on the topic, and arguing for formalization and institutional reform to remain aspirational among researchers and practitioners who commonly accept and promote the role of the informal sector in conflict zones.

This study aims to propose a risk management framework for Islamic banks to address specific risks that are unique to Islamic bank settings.

A unique methodology has been developed first by exploring the dynamics and behaviors of various risks unique to Islamic banks. Second, it integrates them through a series of diagrams that show how they behave, integrate and impact risk, returns and portfolios.

This study proposes a unique risk-return relationship framework encompassing specific risks faced by Islamic banks under the ambit of portfolio theory showing how Islamic banks establish a steeper risk-return path under Shariah compliance. By doing so, this study identifies a unique “Islamic risk-return” nexus in Islamic settings as an explanation for the concern of contemporary researchers that Islamic banks are more risky than conventional banks.

The originality of this study is that it extends the scope of risk management in Islamic banks from individual contract-based to an integrated whole, identifying a unique transmission path of how risks affect portfolio diversification in Islamic banks.

This study aims to analyze the moderating role of capital on the relationship between loan growth and credit risk for Islamic banks in the post-crisis era.

The study used annual data of 217 Islamic banks from 38 countries and ranges from 2010–2019. The study applies a two-step system GMM method for hypotheses testing about the moderating role of bank capital on the relationship between loan growth and credit risk in Islamic banks.

The findings showed that an increase in loan growth increases the credit risk of Islamic banks, as evidenced by loan loss provisions, loan loss reserves and nonperforming loans. The results indicate that capital positively moderates the relationship between loan growth and credit risk in Islamic banking. The positive relationship between bank capital and risk-taking is in line with the “regulatory hypothesis” in banking. The findings predict lower impacts of capital on the relationship between loan growth and credit risk in the South Asian region than MENA, Africa, South, East and Central Asia regions. However, the impact of capital is higher for larger Islamic banks than medium and smaller ones.

The findings of the study add value to the current debate on the role of bank capital to reduce risk-taking in Islamic banks. The study's findings have implications for policymakers, managers, especially in Islamic banking, for improving the Islamic financial system by managing the role of capital, loan growth and credit risk.

This is the first study to explore the moderating role of bank capital on the relationship between loan growth and credit risk in the post-crisis era, especially in Islamic banking. This is the first study in the Islamic banking context, which is providing empirical evidence for the impact of loan growth on the back looking and forward-looking proxies of credit risk under the moderating role of bank capitalization in the post-crisis era. This is the first study, which providing findings based on regions and size to compare the differences in Islamic banks for the impact of loan growth on credit risk under the moderating role of capitalization.

This paper aims to determine the effect of equity financing on bank stability during normal and crisis periods.

This study uses a static panel regression that includes pooled ordinary least square, random effect and fixed effect model to examine the influence of equity financing on bank stability. In estimating bank stability during a financial crisis, the authors predict the occurrence of a crisis using the early warning system (EWS). The authors then used z-score to measure Islamic banks’ stability.

Islamic banks that offer equity financing structure are more stable compared to Islamic banks without such structure. Islamic banks with medium equity financing have highest stability relative to Islamic banks with high or low equity financing. During crises, the Islamic banks with equity financing structure remain relatively stable compared to other Islamic banks.

The sampling coverage could have included a larger number of countries and banks.

The authorities need to strengthen the banking framework to support the Islamic financial products by encouraging a wider use of risk-sharing instruments. Besides using a debt-like financing structure, Islamic banks should also place emphasis on equity financing in instilling the banking sector stability. In monitoring banks with equity financing, the authorities may need to look into the level of equity financing.

Besides avoiding riba and gharar in financing, equity financing encourages cooperation and participation among society as they share the risks.

This paper analyses the effect of equity financing on the Islamic banks stability during normal and crisis periods. This paper further examines the intensity of the equity financing and its influence on bank stability.

Studying the shear stress and pressure resulting on the walls of blood vessels, especially during high-pressure cases, which may lead to the explosion or rupture of these vessels, can also lead to the death of many patients. Therefore, it was necessary to try to control the shear and normal stresses on these veins through nanoparticles in the presence of some external forces, such as exposure to some electromagnetic shocks, to reduce the risk of high pressure and stress on those blood vessels. This study aims to examines the shear and normal stresses of electroosmotic-magnetized Sutterby Buongiorno’s nanofluid in a symmetric peristaltic channel with a moderate Reynolds number and curvature. The production of thermal radiation is also considered. Sutterby nanofluids equations of motion, energy equation, nanoparticles concentration, induced magnetic field and electric potential are calculated without approximation using small and long wavelengths with moderate Reynolds numbers.

The Adomian decomposition method solves the nonlinear partial differential equations with related boundary conditions. Graphs and tables show flow features and biophysical factors like shear and normal stresses.

This study found that when curvature and a moderate Reynolds number are present, the non-Newtonian Sutterby fluid raises shear stress across all domains due to velocity decay, resulting in high shear stress. Additionally, modest mobility increases shear stress across all channel domains. The Sutterby parameter causes fluid motion resistance, which results in low energy generation and a decrease in the temperature distribution.

Equations of motion, energy equation, nanoparticle concentration, induced magnetic field and electric potential for Sutterby nano-fluids are obtained without any approximation i.e. the authors take small and long wavelengths and also moderate Reynolds numbers.

As the revolution of information takes place, industrialized societies are going to become information societies. Developing countries such as Pakistan are going to change due to technology and, in turn, transform the whole structure of libraries. The concept of digital libraries (DL) has emerged due to technological advancements. This study aims to highlight the factors that encourage and discourage the use of the Higher Education Commission’s (HEC) National Digital Library (NDL).

A quantitative research approach was selected for the investigation, while the data collection instrument was a questionnaire. Postgraduate research students were the population of the study. A convenient sampling technique was used for sample selection.

The results of the study indicated that the use of HEC (NDL) was frequent monthly. The display of search results, 24/7 access, the authenticity of items, availability of navigational assistance and up-to-date information encourage researchers to use DL. However, their preference for print material over electronic material, slow downloading speed of the internet and non-availability of older and archival publications were the common reasons for the low use of DL. Furthermore, there are significant differences in terms of using the NDL based on gender, the program of study and the stage of the study.

This study will contribute significantly to the literature from the developing countries and would also helpful for HEC (NDL) authorities and university libraries to design information services.

This study aims to examine the joint effect of accounting background and cross-membership of Islamic Supervisory Board (ISB) members on bank investment efficiency.

This study uses data collected from 36 Islamic banks across 15 countries globally, spanning the period from 2012 to 2021. This research uses an ordinary least squares regression and a comprehensive set of endogeneity and robustness tests.

The findings show a negative relationship between the accounting background of ISB members and investment efficiency. However, when ISB members with accounting backgrounds also have ISB cross-memberships, the banks exhibit high investment efficiency. These results suggest that ISB cross-membership plays a crucial role in facilitating Islamic banks’ access to timely information on investment opportunities. This enables ISB members with accounting expertise to thoroughly assess the benefits and risks associated with their investment prospects. These findings imply that ISB members with accounting backgrounds and cross-memberships have greater motivation and thoughtful considerations for making better investment decisions. Consequently, Islamic banks are better positioned to undertake high profitable investment projects, which enhance their investment efficiency.

The current study holds immense value for Islamic bank management in their selection of ISB members who possess an accounting background and cross-membership.

This study delves into a comprehensive investigation of the proficiency, underlying principles and unique characteristics exhibited by ISB members with an accounting background. Moreover, this study acknowledges the burgeoning global prominence of Islamic banks.

The purpose of this study is to explore how vulnerabilities arising from physical impairments, age, widowhood, forced displacement due to war or natural disasters and sexual orientation affect women’s microfinance-related entrepreneurial activities and economic empowerment.

This paper is a structured literature review and uses preferred reporting items for systematic reviews and meta-analyses (PRISMA) method. The paper also uses agency, resources and achievement dimensions of empowerment to assess the findings.

This study reveals that although microfinance services promote women entrepreneurship, they also exacerbate exclusion and further discrimination. Individual-, household-, institutional- and community-level structures shape women’s agencies to access and use loans and conduct entrepreneurial activities; hence, ultimately economic empowerment.

The originality of this paper arises from the conceptual model we synthesised from our review which illustrates how vulnerable women’s agency is shaped by resources and how it affects their achievements in relation to entrepreneurial activities.